diff --git a/erratum/_sidebar.md b/erratum/_sidebar.md
index 984ecdb..8ce6f88 100644
--- a/erratum/_sidebar.md
+++ b/erratum/_sidebar.md
@@ -2,7 +2,7 @@
 
 * [Système D100](bases/D100.md "Un système D100")
 
-* [Avant propos](lore/avant-propos.md "Avant Propos")
+* [Avant propos](lore/avantpropos.md "Avant Propos")
 
 * Univers